If you like your engines BIG!

This is far beyond tiki, I know, but just too cool:

http://www.bath.ac.uk/~ccsshb/12cyl/

Mount that baby into a Harley, then you'de be stylin man!

Cool pictures, not sure why they use such a setup for container ships. The big cruise ships use diesels driving generators which run multiple electric engines. The huge new cruise ships have the engines mounted on external pods, the whole pod turns for better manuererability. Single screw ships are harder to handle.